iMac 27″ 2007 and 2011 video card repair

The 27" iMac are still good computers used by photographers and graphic designers but not only. With a dedicated AMD Radeon VGA card that can be: For 2009 models: - 3.06GHz - ATI Radeon HD 4670 graphics processor with 256MB of GDDR3 memory - ATI Radeon HD 4850 graphics processor with 512MB of GDDR3 memory [...]